Terry Hart
Truma Ultrastore PCB
Truma Ultrastore water heater PCB. This is part number : 70020 - 72100, this replaces 70020-71600, Ebay sells these new from £49 to £120.
It's possible the fault will be a bad connection between header sockets and plugs J1 to J3 or crimping/oxidization between conductor and header plug tab - hopefully ! unplug the connectors then plug them in again - see if that cures the problem.
Replace 1.6amp slow blow fuse, even if it looks good, clean up fuse holder, look underneath at soldering, resolder any dodgy solder joints, if possible use a small tip 15 watt solder iron and don't leave too long on the joint to be resoldered, about 2 to 3 seconds is good. Its always advisable to use a anti-static wrist band and/or at least ground yourself before handling the PCB.
Truma Ultrastore PCB
Truma Ultrastore water heater PCB. This is part number : 70020 - 72100, this replaces 70020-71600, Ebay sells these new from £49 to £120.
It's possible the fault will be a bad connection between header sockets and plugs J1 to J3 or crimping/oxidization between conductor and header plug tab - hopefully ! unplug the connectors then plug them in again - see if that cures the problem.
Replace 1.6amp slow blow fuse, even if it looks good, clean up fuse holder, look underneath at soldering, resolder any dodgy solder joints, if possible use a small tip 15 watt solder iron and don't leave too long on the joint to be resoldered, about 2 to 3 seconds is good. Its always advisable to use a anti-static wrist band and/or at least ground yourself before handling the PCB.